reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

  poky: 87e3a9739d
  meta-openembedded: 6094ae18c8
  meta-security: 31dc4e7532
  meta-raspberrypi: a48743dc36
  meta-xilinx: c42016e2e6

Also re-apply backports that didn't make it into thud:
  poky:
    17726d0 systemd-systemctl-native: handle Install wildcards

  meta-openembedded:
    4321a5d libtinyxml2: update to 7.0.1
    042f0a3 libcereal: Add native and nativesdk classes
    e23284f libcereal: Allow empty package
    030e8d4 rsyslog: curl-less build with fmhttp PACKAGECONFIG
    179a1b9 gtest: update to 1.8.1

Squashed OpenBMC subtree compatibility updates:
  meta-aspeed:
    Brad Bishop (1):
          aspeed: add yocto 2.6 compatibility

  meta-ibm:
    Brad Bishop (1):
          ibm: prepare for yocto 2.6

  meta-ingrasys:
    Brad Bishop (1):
          ingrasys: set layer compatibility to yocto 2.6

  meta-openpower:
    Brad Bishop (1):
          openpower: set layer compatibility to yocto 2.6

  meta-phosphor:
    Brad Bishop (3):
          phosphor: set layer compatibility to thud
          phosphor: libgpg-error: drop patches
          phosphor: react to fitimage artifact rename

    Ed Tanous (4):
          Dropbear: upgrade options for latest upgrade
          yocto2.6: update openssl options
          busybox: remove upstream watchdog patch
          systemd: Rebase CONFIG_CGROUP_BPF patch

Change-Id: I7b1fe71cca880d0372a82d94b5fd785323e3a9e7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openembedded/meta-networking/recipes-connectivity/networkmanager/networkmanager/musl/0002-musl-dlopen-configure-ac.patch b/meta-openembedded/meta-networking/recipes-connectivity/networkmanager/networkmanager/musl/0002-musl-dlopen-configure-ac.patch
index 548cccb..c162c1d 100644
--- a/meta-openembedded/meta-networking/recipes-connectivity/networkmanager/networkmanager/musl/0002-musl-dlopen-configure-ac.patch
+++ b/meta-openembedded/meta-networking/recipes-connectivity/networkmanager/networkmanager/musl/0002-musl-dlopen-configure-ac.patch
@@ -1,7 +1,7 @@
 From 57239fda56b68a8f3e413f7b6af5290ba0d86636 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
 Date: Thu, 22 Mar 2018 18:18:06 +0100
-Subject: [PATCH 2/4] musl: dlopen is included so LD_LIBS="" instead of
+Subject: [PATCH] musl: dlopen is included so LD_LIBS="" instead of
  LD_LIBS="none required"
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
@@ -22,7 +22,7 @@
 index 487a266..96ae4f7 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -305,6 +305,7 @@ dnl
+@@ -235,6 +235,7 @@ dnl
  dnl Checks for libdl - on certain platforms its part of libc
  dnl
  AC_SEARCH_LIBS([dlopen], [dl dld], [], [ac_cv_search_dlopen=])